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排水系统一直是市政服务的主要问题。
Drainage has always been the main problem among municipal services.
youdao
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对地下结构的主要形式之一城市给排水管道的震害进行了研究。
The earthquake damage to water supply and sewerage pipelines is studied.
youdao
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对地下结构的主要形式之一城市给排水管道的震害进行了研究。
The earthquake damage to water supply and sewerage pipelines is studied.
youdao